2. interface implementation example

• A Product class implementing the Printable interface:

  
      import java.text.NumberFormat;
  
      public class Product implements Printable
      {
          //...
          // implement the Printable interface
          public void print() 
          {
              System.out.println(
                  "Code:          " + code);
              System.out.println(
                  "Description:   " + description);
              System.out.println(
                  "Price:         " + 
                  this.getFormattedPrice());
          }
      }//class Product